Table 2: Experimentally and theoretically simulated IR spectra (in cm−1) of the studied complexes. Assignment of experimentally measured IR key modes.

Ligands and complexesυ (OH)υ (NH)υ (CN)υ (COOasy)υ (COOsy)υ (M-O)υ (M-N)

Glutamic306212421634(vs)1418(s)

Arginine308711751680(vs)1574(s)
1586
1608

[Co(glu)(arg)(H2O)2]·0.5H2O3345(s)317211311663(s)1421(vs)538416
1584
1609
[Ni(glu)(arg)(H2O)2]·0.5H2O3340(s,br)318411221658(s)1426(vs)540421
1586
1607

[Cu(glu)((arg)]·H2O3453(s)314111261676(s)1456(m)572456
1588
1604

[Zn(glu)(arg)(H2O)2]·H2O3427(s)314411271671(s)1425(s)538412
1582
1606